Resetting mechanism for calculating-machines.



UNITED STATES PATENT OFFICE.

FERDINAND STEMMLER AND CARL SCI-IALLER, OF BRUNSWICK, GERMANY, ASSIGN- ORS TO GRIMME, NATALIS & C0. COMMANDITGESELLSCHAFT AUF ACTIEN, BRUNS- WICK, OF BRUNSWICK, GERMANY, A CORPORATION OF GERMANY.

RESETTING MECHANISM FOR CALCULATING-MACHINES.

Specification of Letters Patent.

Patented May 6, 1913.

Application filed October 15, 1912. Serial No. 725,862.

Empire. ofGermany, residing at Brunswick,

Germany, have invented certain new and useful Improvements in Resetting Mechanisms for Calculating-Machines, of which the following is a specification. v

Our invention relates to improvements in resetting mechanisms for calculating machines,.and more particularly in calculating machines of the class described in the United States patent to Trinks, No. 1,022,280, granted February 8, 1912, in which by 'means of a single registering mechanism continuous multiplications and additions can simultaneously be performed. As described in the specification of the said patent a part of the numeral wheels of the main registering mechanism can independently be reset.

The object of the present improvements is towprovide a resetting mechanism of simple construction. With this object in view our invention consists in so constructing the resetting means, that the continuous resetting shaft which carries both sections of the main registering mechanism is adapted to reset the numeral wheels of both sections. For this purpose two .cams are arranged for cooperation with the resetting devices one of which is thrown into operation to reset the numeral wheels of one set, ordinarily those of the left one, while the other one is thrown into operation for resetting the numeral wheels of the other set, that is those of the right one, or simultaneously both sets.

'In order that our invention be more clearly understood, two examples embodying the same have been shown in the accompanying drawing, in which the sameletters of reference have been used in all the views to indicate corresponding parts.

beenomitted, and Fig. 3, is a similar horizontal cross-section of the registering mechanlsm showing a modification of the invention, said section showing only one of the numeral wheels.

The main parts of the calculating machine illustrated diagrammatically in Flg. 1 and described for example in the specification of the aforesaid Letters Patent No. 1,022,280 to Trinks are the setting mechanism, 1 disposed in the upper .part of the casing .of the machine and adapted to be operated, by a crank 2, the main registering mechanism 3 provided with carrying means and comprising two sets 4 and 5 of numeral wheels, the revolutions counting mechanism 7, and the resetting mechanisms of the registering mechanism and revolutions counting mechanism indicated by the thumb mits 11 and 11 operating the same. These parts are known in the art and therefore need no detailed de' scription.

Referring more particularly to the embodiment of our invention illustrated in Fig. 2, all the numeral wheels 24: and 24 of the registering mechanism are mounted on an undivided reset-ting shaft 9. The latter is equipped with pins}? one for each of the numeral wheels and cooperating each with a nose 10 or 10 provided on the numeral wheels. pins are adapted to carry the numeral wheels along when the shaft 9 is turned for resetting the numeral wheels. As appears from the figure, all the noses 10 and 10 of the .two sets of numeral wheels are made of differentlengths, the noses 10 of the numeral wheels of the left hand set being about twice as long as the noses 10 of the right hand set of numeral wheels 24 and accordingly the pins 9 of the shaft 9 are at a greater distance away from the noses 10 than from the noses 10.

As is known in the art, when for the purpose of resetting the numeral wheels the shaft 9 is turned by means of a thumb nut 11 secured thereto, it is at first shifted to the right a certain distance by the cam face 37. In the present case by this shifting As is known in the art the said cam is formed on a rotatably mounted sleeve '30 adapted to be locked against rotation by each other. Therefore only the numeral wheels 24 of theleft hand set are reset by the rotation of the resetting shaft 9, while the numeral wheels 24 of the right hand set remain in their original positions.

To enable the operator to reset the numeral wheels 2 1 of the right hand set we provide means whereby the resetting shaft can beshifted a greater distance to the right,

which means consist, in the example illusthe thumb nut 11, and this sleeve is adapted to be connected to the said thumb nut by means of a pin 38. The sleeve is formed at both ends with cam faces '37 and 40, and the cam face 40 has a greater inclination and depth than the cam face 37. When turning the thumb nut the sleeve 39 ordinarily remains stationary so that the cam face .37 is operative. But when the sleeve 39 is coupled with the nut 11, it takes part in the rotation of the nut, so that the thumb nuti nd the shaft 9 are shifted to the right a distance which corresponds to the depth of the cam face 40. Thereby also the pins 9 cooperatingivith the numeral wheels 24 of the right hand set are shifted sufficiently to engage the corresponding noses 10 Therefore both sets of numeral wheels are simultaneously reset.

In the example shown in Fig. 3 all the numeral wheels 24 forming the registering mechanism are located on a shaft 19 which is equipped with pins 19 and is loosely mounted in the side walls 25 of the carriage 6. At its left hand end the shaft 19 is made hollow, and within its hollow portion it receives a longitudinally 'shiftableshaft 26 which carries pins 26 projecting through a longitudinal slot in the shaft 19 and arranged for coiiperation with the numeral wheels of the left hand section of the registering mechanism. The resetting pins 19 of the numeral wheels of the right hand set are secured to the right hand part of the shaft 19. The shaft 26 is adapted to be shifted longitudinally of the shaft 19 against the actionof as ring 29 by means of a cam located at its le t hand end and coiiperating with a pin 27 secured to the shaft 26. The

means of a sprin actuated pin 31. The right hand end 0 the shaft 19 is guided within a sleeve 32 loosely mounted within he side wall 25 of the"carriage 6, and it is equipped with a thumb nut 11 and a nose 33 engaging a cam face 34 formed on the sleeve 32. The latter can be locked against rotation by means of a'spring actuated pin 35 slid- As shown a sleeve 39 is. loosely mounted on the'shaft 9 adjacent to ably mounted at the outside of the carriage. a

If it is desired to simultaneously reset the numeral wheels 24 of both sets, both pins 31 and 35 are set into locking position, as is shown in Fig. 3, and the thumb nut 11 is operated to perform ay'com'plete revolution. Thereby the shaft 19 engaging with .its nose 33 the cam face 34 and the shaft 26 engaging with its pin 27 the cam face 28 are simultaneously shifted in longitudinal direction toward the right. iereby the pins 19 and 26 are respectively. brought into engagement with the corresponding noses 10 of the numeral wheels -'24,""so that all the numeral wheels are simultaneouslygreset.

If it is desired, to resetonly the numeral wheels of the right hand set the locking pin 31 is withdrawn but of locking position relatively to the sleeve 30. If now the thumb ;of the wall 25 vnut 11 performs a complete revolution, the

inner shaft 26 is not shifted, because the sleeve 30 is free to take part in the rotation of the shaft 26. The sleeve 32 being locked by its pin 35, the shaft 19 is shifted to'the right, so that the numeral wheels of the right hand set are reset.

If it is desired to reset exclusively the numeral wheels of the left hand set, the locking pin 35 is withdrawn from the sleeve 32, so thatthe latter is free to rotate Within the side wall 25, and the pin 31 is set into locking position. If now the thumb nut 11 is turned, the shaft 19 is rotated without being shifted, and the rotation of the shaft 19 is imparted to the shaft 26. The latter is shifted, by means of the sleeve 30 which is locked by means of the pin 31.

The construction shown in Fig. 3 is prefwhole result must be removed from the registering mechanism and the calculation must be made over again, because the numeral wheels 24 of Fig. 2, which correspond to the section 5 of Fig. 1, can not separately be reset. In the construction shown in Fig. 3 it is in such cases not necessary to remove the whole result, because the numeral wheels ofboth sets. can be simultaneously reset, and the numeral wheels of each set can be reset independently of the other one.

While in describing the invention we have shown two examples which in ouropinion serve the purpose best, we wish it to be understood, that our invention is not limited to the constructions shown in the drawing, and that'various changes may be made without. departing from the gist of our invention.- For example, the means for simulta-' mally out of coiiperation therewith, means for moving said member bodily. in one direction to shift the resetting devices of one group of registering elements into resetting engagement with their registering elements independently of the resetting devices ofanother group, and means to simultaneously shift the resetting devices of all the registering elements into resetting position.

2. In a calculating machine, the combination with the registering mechanism comprising two sets of numeral wheels, of a single, continuous rotary shaft carrying all the said numeral wheels, resetting devices on said shaft one for each of the numeral wheels, means for moving said shaft bodily in one direction to shiftthe resetting devices of the numeral wheels of one setinto resetting enga ement with their numeral wheels indepen ently of the resetting means of the numeral wheels'of the other set, and means to simultaneously shift the resetting devices of all the numeral wheels into resetting position. I

3. In a calculating machine, the combina tion with the registering mechanism com prising two sets of numeral wheels, ofa rotary shaft carrying the numeral wheels of both sets, resetting devices on said shaft arranged for coeperation with the numeral wheels of one set, a member shi ftable' in said shaft and carrying resettin devices .for the other set of numeral whee s, means to shift said shaft with its resetting devices into resetting'position, means to shift said" member with its resetting devices into resetting position, and means independent of each other to throw said shifting means for the resetting devices of both sets of numeral wheels into ino erative positions.

4. 'In a calculating machine, the combination with the registering mechanism comprising two sets of numeral wheels, of a rotary shaft carrying the numeral wheels of both sets and havlng a hollow or tubular part, resetting devices on saidshaft arranged for coiiperation with the numeral Wheels of one set, a member shiftable within said hollow or tubular part of said shaft and carrying resettin devices for the other set of numeral whe'e s, cams to shift said shaft and member with their resetting devices into resetting positions, and means independent of each other to throw said cams into inoperative positions.

. 5. In -a calculating machine, the combina- 7 tion with the registering mechanism comprising two sets of numeral wheels, of a rotary shaft carrying the numeral wheels of both sets, resetting devices on said shaft arranged for coiiperation vwith the numeral wheels of one set, a spring actuated member shiftable in said shaft and carrying resetting devices for the other set of numeral- Wheels, means to shift said shaft with its resetting devices into resetting position, means to shift said member with its resetting devicesinto-resetting position, and means .independent of each other-to throw said shifting means for the resetting devices of both sets .of numeral wheels into inoperative 'positions. p

In testimony whereof we have hereunto set-our hands 1n presence of two subscribing witnesses. v

' FERDINAND STEMMLER. CARL SCHALL ER. Witnesses: WILHELM LEHSKE, J ULIUS SEGKEL. 

